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Anyway to dial.down the dB on these dam things without much loss, ever a better quality fan?

2 fans help.    this one http://www.amazon.com/gp/product/B00A460TK6/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

  and this one

http://www.amazon.com/Delta-Electronics-AFB1212HHE-F00-120x120x38-connector/dp/B004CN3NLE/ref=sr_1_1?s=pc&ie=UTF8&qid=1420660264&sr=1-1


will lower the sound

or the silverstone with this one.

 http://www.amazon.com/gp/product/B00KFCRATC/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

What would be the minimum recommended CFM and pressure for the pushing fan and the pulling one?
Thanks.

With prisma I would air on side of caution as far as turning down fans and such.  I can understand replacing with quieter ones.

But without a temperature sensor, this is not really the miner to try to use the least amount of fans to cool it.

There has to be a way because i have 6 prismas and they are driving me crazy :).When i spend more than 2 hours in the warehouse where they are located i have a headache.I would not change the fans without advice from somebody with more knowledge.

  you can do it I found a way.  use the silver stone


 http://www.amazon.com/Silverstone-Cooler-Computer-Cooling-FHP-141/dp/B00A460TK6/ref=sr_1_1?ie=UTF8&qid=1429755692&sr=8-1&keywords=silverstone+141

and 1 of these

http://www.ebay.com/itm/380922276988?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT


but I had the older prisma so I am not sure the silver stone will fit.

if it does not fit try two of the ebay fan.

these fans move a lot of air but at lower noise levels.

Will two fans like these provide enough airflow in  push and pull config? SUNON MEC0381V1-000U-A99

okay they are rated to
http://www.soselectronic.com/?str=371&artnum=70310&name=sunon-mec0381v1-a99-mec0381v1-0000-a99#tabs-2

234 m3/h   234 cubic meters per hour  needs to be divided by 1.7 to get to cfm so they are 137 CFM


I would use it and the silverstone which is   170 cfm

you will be much quieter then stock and still be moving a lot of air.

you could buy 2 sunon and 1 silverstone.

and test 2x sun vs     1x sun and 1x silverstone

these are moving quite a bit of air , but I used

1 silverstone and 1 antminer s-3 fan with my   prisma 1 safely for 2 weeks   that is about 170 cfm + 130 cfm

the 2 sunon would be just a bit less air then the mix of the silverstone and sunon

Do you have some temp readings before and after?

actually there are some photos in the prisma threads I am look for them


2 tubes with antminer fans as push and silverstone as pull

https://bitcointalk.org/index.php?topic=795477.msg9240679#msg9240679


https://bitcointalk.org/index.php?topic=795477.msg9314683#msg9314683

https://bitcointalk.org/index.php?topic=795477.msg9320830#msg9320830

https://bitcointalk.org/index.php?topic=795477.msg9522882#msg9522882

https://bitcointalk.org/index.php?topic=795477.msg9542823#msg9542823


all same topic some on short and some on long(prisma)

Thank you for your help.Ordered 4 fans and a fan controller and a ir temp gun :).

let me know how you make out.